Costco Pork Loin Recipe

If you’ve ever walked past the meat section at Costco and spotted those huge boneless pork loins, you may have wondered, “What on earth would I do with that?” Well, wonder no more. This Costco Pork Loin Recipe will show you exactly how to transform that giant cut into multiple meals that are both cost-effective and restaurant-quality.

Buying a whole pork loin is one of the smartest grocery decisions you can make. Not only can you break it down into roasts, chops, and specialty cuts, but you can also prep, store, and cook them in a variety of delicious ways.

Today, we’re making a Tuscan-style pork roast and perfect sous-vide pork chops using one Costco pork loin. By the end, you’ll be convinced that whole pork loin deserves a permanent spot on your shopping list.

My Personal Experience With This Costco Pork Loin Recipe

The first time I bought a full Costco pork loin, I’ll admit I was a little intimidated. It looked massive, and I wasn’t sure where to start. But after breaking it down once, I realized how easy and satisfying it can be.

The beauty of working with a whole loin is that you get total control over portion sizes, cuts, and cooking styles. You can have a roast for Sunday dinner, thick chops for sous-vide, and blade-end pieces for grilling all from one purchase.

This Costco Pork Loin Recipe became a favorite in my kitchen because it’s economical, flavorful, and versatile. Plus, there’s something deeply rewarding about turning a single piece of meat into several gourmet-level dishes.

Ingredients Required for Costco Pork Loin Recipe

Gather all the following ingredients, before you start making this Costco Pork Loin

• 1 whole Costco boneless pork loin (center cut portion for roast)
• 2–3 tbsp fresh rosemary, chopped
• 8 cloves garlic, minced
• ⅓ cup high-quality olive oil
• Zest of 1 lemon
• 4 oz pancetta
• Salt & freshly ground black pepper
• Fresh parsley (for garnish)
• Pork chops from blade and sirloin ends of the loin
• Fresh thyme sprigs
• Fresh rosemary sprigs
• Garlic cloves
• Salt & pepper
• 1 cup chicken stock
• ¼ cup dry sherry
• 2 tbsp butter
• Fresh thyme sprigs
• Juice of ½ lemon

Kitchen Utensils Required

1. Sharp chef’s knife
2. Cutting board
3. Butcher’s twine
4. Meat mallet or heavy-bottomed frying pan
5. Stainless steel frying pan
6. Fine mesh sieve
7. Vacuum sealer & sous-vide machine (optional)
8. Cast-iron or heavy skillet

Preparation & Cooking Time

Preparation Time: 25 minutes (plus breakdown time)
Cooking Time:
Pork roast: 2 hours 10 minutes
Sous-vide pork chops: 1–1.5 hours
Total Time: ~3 hours
Servings: 6–8 people

Copycat Costco Pork Loin Recipe

Just follow this simple step by step guideline to make your homemade version of Costco Pork Loin in a delicious way.

Step 1. Break Down the Pork Loin: Choose a whole Costco boneless pork loin with a good fat cap. Pat dry and cut into sections: center cut for roast, blade end for grilling chops, and sirloin end for thick sous-vide chops.

Step 2. Prepare & Butterfly the Roast: Butterfly the center cut into a flat sheet by slicing in layers. Cover with plastic wrap and pound evenly using a meat mallet or heavy pan.

Step 3. Make the Herb-Pancetta Paste: In a cold pan, combine chopped rosemary, minced garlic, olive oil, and lemon zest. Heat gently for 2 minutes, strain the oil, and blend the solids with pancetta into a smooth paste.

Step 4. Roll, Tie & Roast: Season the butterflied pork with salt and pepper. Spread the paste evenly, leaving a 2-inch gap at one edge. Roll tightly, seam-side down, tie with butcher’s twine, and roast at 275°F for 2 hours or until 135°F internal temperature.

Step 5. Sear & Make Vinaigrette: Sear the roast in a hot skillet until browned all over. Make a quick vinaigrette with seared lemon juice, reserved herb oil, and parsley. Drizzle over sliced roast.

Step 6. Sous-Vide & Sear the Chops: Season chops, seal with garlic, thyme, and rosemary, then sous-vide at 144°F for 1–1.5 hours. Sear quickly, deglaze with stock, sherry, and lemon, reduce, whisk in butter, and serve.

Delicious Ways to Customize and Serve This Costco Pork Loin

Here are some Variations and Customizations ideas you can try to enjoy this Costco Pork Loin deliciously

1. With Creamy Garlic Mashed Potatoes
Nothing soaks up that herby pan Avocado Lime Sauce quite like silky mashed potatoes. We’ve done this pairing more times than we can count it’s pure comfort.

2. Over a Bed of Herbed Couscous
When we want something lighter but still flavorful, couscous with fresh parsley and lemon zest makes the pork shine.

3. With Roasted Seasonal Veggies
Crispy carrots, parsnips, and Brussels sprouts roasted in the oven with olive oil and sea salt are the perfect earthy counterpoint.

4. Beside a Fresh Carrabba’s Caesar Salad
The peppery bite of arugula with shaved Parmesan and a drizzle of balsamic cuts through the richness beautifully.

5. On a Warm Ciabatta Sandwich
Leftover pork roast sliced thin with provolone and a smear of aioli in a crusty ciabatta roll… we’ve turned dinners into unforgettable lunches this way.

6. With Buttery Egg Noodles
Tossed with a little reserved vinaigrette, egg noodles turn this into a rustic, Tuscan-inspired pasta dish.

7. Alongside Grilled Asparagus
The char from the asparagus complements the seared pork like they were made for each other.

8. Over Creamy Polenta
Polenta’s soft, cheesy texture is perfect for catching every drop of that lemon-parsley sauce.

9. With a Crisp Apple Slaw
We love the sweet-tart crunch it balances the pork’s richness effortlessly.

10. Topped with a Poached Egg
Sounds decadent, right? Trust me, cutting into that yolk over warm pork roast is Sunday brunch perfection.

Some Notable Tips and Tricks on This Costco Pork Loin Recipe

Here are some tips and tricks you should follow when trying this recipe.

1. Pick a pork loin with a fat cap.
The fat keeps the meat juicy and tasty while it cooks.

2. Pat it dry first.
Dry meat browns better. Wet meat just steams.

3. Use a sharp knife.
It’s safer and makes cutting the pork much easier.

4. Pound the roast evenly.
This helps it cook the same all the way through.

5. Start herbs and garlic in a cold pan.
This makes them sweet, not bitter.

6. Leave a little space when you roll it.
That way, the filling doesn’t spill out.

7. Tie the roast snugly.
It holds the shape and cooks more evenly.

8. Cook it slow and low.
This keeps it tender and stops it from drying out.

9. Rest before slicing.
Give the roast 5–10 minutes so the juices stay in.

10. Save the pan juices.
They make the best sauce for the pork.

How to Store and Reheat Leftover Costco Pork Loin Properly?

If you have any leftover (hopefully you don’t have) you can process them properly as follows,

Store cooked pork in an airtight container in the refrigerator for up to 3–4 days. Reheat gently in a 275°F oven or in a covered skillet over low heat to maintain moisture.

FAQs on this Copycat Costco Pork Loin Recipe

When you give this Costco Pork Loin Recipe a try, you might have a few questions. Don’t worry-we’ve rounded up answers to the most common ones to help you out.

1. Can I use a pre-cut pork loin instead of a whole one?

You can, but you’ll miss the fun (and savings) of breaking it down yourself. A whole loin gives you roasts, chops, and more all in one go.

2. How do I know if my pork is cooked perfectly?

We go by temperature 135°F for the roast before searing, and 144°F for sous-vide chops. Then rest before slicing. This keeps it juicy every time.

3. What if I don’t have a sous-vide machine?

No problem! You can still pan-sear or roast the chops. Just keep an eye on the internal temp so they don’t dry out.

4. Why start garlic and rosemary in a cold pan?

We’ve learned this gives a sweeter, gentler flavor and avoids that bitter, burnt garlic taste.

5. Can I prep this ahead of time?

Absolutely. We often season, roll, and tie the roast the night before. Just cover and refrigerate until you’re ready to cook.

6. How long can leftovers last?

About 3–4 days in the fridge, stored in an airtight container.

7. Can I freeze the pork?

Yes! We vacuum-seal extra chops and roasts all the time. They’re great for future quick dinners.

8. What’s the best oil for this recipe?

We use a good olive oil for flavor, especially since it’s part of the vinaigrette.

9. Do I have to tie the roast?

It really helps. We’ve tried without tying, and it cooked unevenly and lost its shape.

10. What sides go best with this?

Mashed potatoes, roasted veggies, polenta, or a fresh salad trust us, we’ve tried them all.

This Costco Pork Loin Recipe is proof that a single cut of meat can become the star of multiple gourmet meals. From juicy, herb-packed roast to perfectly tender sous-vide chops, the possibilities are endless when you start with a whole loin. Next time you’re at Costco, skip the pre-cut packs and grab a full pork loin. Break it down, try this recipe, and taste the difference. Trust me you’ll never look at pork the same way again.

We’d love to hear how this recipe turns out for you! Give it a try, then drop a comment below to share your thoughts and tips with us.

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